3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array(7, 4, 3, 2, 5, NAN, 6); sort($arr); print_r($arr);
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.1.10 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Array ( [0] => NAN [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 [6] => 7 )
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.7
Array ( [0] => 2 [1] => 3 [2] => 4 [3] => 5 [4] => 7 [5] => NAN [6] => 6 )
preferences:
157.92 ms | 402 KiB | 228 Q